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Sulphohalite

A valid IMA mineral species - grandfathered
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About SulphohaliteHide

Formula:
Na6(SO4)2FCl
Colour:
Colourless, gray, greenish yellow; colourless in transmitted light.
Lustre:
Vitreous, Greasy
Hardness:
3½
Specific Gravity:
2.489 - 2.500
Crystal System:
Isometric
Name:
The name is derived from its composition, containing SULFur, plus Greek "hals", salt, alluding to its content of halogens. Originally described from the Searles Lake, California, USA by Hidden and MacKintosh (1888).
Sulphohalite Subgroup.

Sulphohalite is an ordered double antiperovskite with the anti-elpasolite structure (Krivovichev 2008).


Unique IdentifiersHide

Mindat ID:
3824
Long-form identifier:
mindat:1:1:3824:5

IMA Classification of SulphohaliteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Na6(S6+O4)2ClF
First published:
1888

Classification of SulphohaliteHide

7.BD.05

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
30.1.7.1

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
26.2

26 : Sulphates with Halide

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
SlhlIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of SulphohaliteHide

Vitreous, Greasy
Transparency:
Transparent
Comment:
Luster weak.
Colour:
Colourless, gray, greenish yellow; colourless in transmitted light.
Streak:
White
Hardness:
3½ on Mohs scale
Fracture:
Conchoidal
Density:
2.489 - 2.500 g/cm3 (Measured)    2.505 g/cm3 (Calculated)

Optical Data of SulphohaliteHide

Type:
Isotropic
RI values:
n = 1.455(1)
Surface Relief:
High (negative)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus

Chemistry of SulphohaliteHide

Mindat Formula:
Na6(SO4)2FCl
Element Weights:
Element% weight
Na35.873 %
O33.287 %
S16.678 %
Cl9.220 %
F4.941 %

Calculated from ideal end-member formula.
Na
O
S
Cl
F

Crystallography of SulphohaliteHide

Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Fm3m
Setting:
F4/m32/m
Cell Parameters:
a = 10.068(3) Å
Unit Cell V:
1,020.54 ų (Calculated from Unit Cell)
Morphology:
Crystals commonly dodecahedral; also octahedral, or with combinations of a, o and d.
Comment:
(Krivovichev, 2008).

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018630SulphohaliteSakamoto Y (1968) The size, atomic charges, and motion of the sulfate radical of symmetry -43m in the crystal of sulfohalite, Na6ClF(SO4)2 Journal of Science of the Hiroshima University, Series A-II: Physics and Chemistry 32 101-1081968not provided0293
0018057SulphohaliteWatanabe T (1934) The crystal structure of sulphohalite _cod_database_code 1011182 Proceedings of the Japan Academy 10 575-57719340293
0010549SulphohalitePabst A (1934) The crystal structure of sulphohalite Zeitschrift fur Kristallographie 89 514-51719340293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Loading XRD data...
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
3.56 Å(100)
2.91 Å(80)
1.779 Å(65)
2.51 Å(60)
1.939 Å(50)
3.03 Å(40)
2.249 Å(25)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
25 : Evaporites (prebiotic)
Stage 7: Great Oxidation Event<2.4
45a : [Sulfates, arsenates, selenates, antimonates]
45b : [Other oxidized fumarolic minerals]

Type Occurrence of SulphohaliteHide

General Appearance of Type Material:
Well formed rhombic dodecahedrons with faces to 2.5 cm.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
Evaporite deposit.

Synonyms of SulphohaliteHide

Other Language Names for SulphohaliteHide

Simplified Chinese:卤钠石
Traditional Chinese:鹵鈉石

Relationship of Sulphohalite to other SpeciesHide

Common AssociatesHide

Associations Based on Photo Data:
6 photos of Sulphohalite associated with BoraxNa2(B4O5)(OH)4 · 8H2O
5 photos of Sulphohalite associated with TronaNa3H(CO3)2 · 2H2O
1 photo of Sulphohalite associated with HaliteNaCl

Related Minerals - Strunz-mindat GroupingHide

7.BD.HasanoviteKNa(MoO2)(SO4)2Mon. 2/m : P21/c
7.BD.Kennygayite[Pb4O2(OH)2](SO4)Tric. 1 : P1
7.BD.AdanitePb2(Te4+O3)(SO4)Mon. 2/m : P21/c
7.BD.CadsulfohiteCd2(SO4)(OH)2Mon. 2/m : P21/c
7.BD.HybleritePb4Bi2(SO4)2(CO3)O4Orth. mmm(2/m2/m2/m) : Cmcm
7.BD.ZanelliitePbCu9[AsO3.5(OH)0.5]2(AsO4)2(OH)9(H2O)3Mon. 2/m : B2/b
7.BD.EvanichitePb6Cr3+(Cr6+O4)2(SO4)(OH)7FClTrig. 3 : P3
7.BD.10GaleiteNa15(SO4)5F4ClTrig. 3m : P31m
7.BD.10SchaireriteNa21(SO4)7ClF6Trig. 3m : P31m
7.BD.15KogarkoiteNa3(SO4)FMon. 2/m : P21/m
7.BD.20AiolositeNa4Bi(SO4)3ClHex. 6/m : P63/m
7.BD.20CaracoliteNa3Pb2(SO4)3ClMon. 2/m : P21/m
7.BD.20CesaniteNa3Ca2(SO4)3(OH)Hex. 6 : P6
7.BD.25BurkeiteNa6(CO3)(SO4)2Orth.
7.BD.30HanksiteNa22K(SO4)9(CO3)2ClHex. 6/m : P63/m
7.BD.35CannoniteBi2(SO4)O(OH)2Mon. 2/m : P21/c
7.BD.40LanarkitePb2(SO4)OMon. 2/m : B2/m
7.BD.45GrandreefitePb2(SO4)F2Mon. 2/m
7.BD.50ItoitePb3Ge4+(SO4)2O2(OH)2Orth. mmm(2/m2/m2/m) : Pnma
7.BD.55ChiluiteBi3Te6+Mo6+O10.5Hex.
7.BD.60HectorfloresiteNa9(SO4)4(IO3)Mon. 2/m : P21/c
7.BD.65PseudograndreefitePb6(SO4)F10Orth. 222 : F222
7.BD.70SundiusitePb10(SO4)O8Cl2Mon.

Fluorescence of SulphohaliteHide

Pale bluish white

Other InformationHide

Notes:
Slowly soluble in cold water.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for SulphohaliteHide

References for SulphohaliteHide

Reference List:

Localities for SulphohaliteHide

Showing 6 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Antarctica
 
  • East Antarctica
    • Victoria Land
      • Ross Archipelago
        • Ross Island
Kammerer (2011)
China
 
Kezao Chen (1992)
Italy
 
  • Veneto
    • Metropolitan City of Venice
      • Venice
De Vecchi et al. (pp. 417-443)
Namibia
 
  • Oshana Region
    • Uuvudhiya
Specimen in the collection of the ... +2 other references
Tanzania
 
  • Arusha Region
    • Monduli District
Káldos et al. (2015)
USA (TL)
 
  • California
    • San Bernardino County
Hidden (1888) +10 other references
 
and/or  
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